I used to umpire slow pitch softball and the time clock ticking down does make the participants work with a sense of urgency.
Last night I had a college game go nine innings in just under four hours.
In my opinion, areas that need to be addressed regarding length of games are:
Granting time so infielders can pat the pitcher on the butt pitcher after each batter reaches base.
Granting multiple catcher trips to the mound to counsel the pitcher each inning.
Too many pitches allowed by umpires between innings.
Too many signals to be relayed with runners on (F6 to pitcher, coach to F2, F2 to pitcher, etc.)
Every time a pickoff occurred the signals had to be relayed from each of the above again.
Shall I go on?